/* Intelligence Club v4 — World-Class Landing Page */

/* CSS Custom Properties for Animated Gradients */
@property --gradient-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@property --gradient-x {
  syntax: '<percentage>';
  initial-value: 0%;
  inherits: false;
}

@property --gradient-y {
  syntax: '<percentage>';
  initial-value: 0%;
  inherits: false;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Variables */
:root {
  /* Colors */
  --bg-primary: #000000;
  --bg-surface: #0a0a0a;
  --bg-elevated: #111111;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent: #d4a853;
  --accent-dim: rgba(212, 168, 83, 0.1);
  --accent-bright: rgba(212, 168, 83, 0.3);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --container-padding: 1.5rem;
  --section-gap: 10rem;
  
  /* Transitions */
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
  
  /* Shadows */
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.15);
}

/* Base */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 0;
  backdrop-filter: blur(20px);
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.8s var(--ease-out-quart);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.logo {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-cta {
  padding: 0.75rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.6s var(--ease-out-quart);
}

.nav-cta:hover {
  background: var(--bg-surface);
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow-x: hidden;
  padding: 0 var(--container-padding);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: 
    conic-gradient(from var(--gradient-angle), 
      #000000 0deg,
      #0a0a0a 45deg,
      rgba(212, 168, 83, 0.08) 90deg,
      #000000 135deg,
      #0a0a0a 180deg,
      rgba(212, 168, 83, 0.06) 225deg,
      #000000 270deg,
      #0a0a0a 315deg,
      #000000 360deg
    );
  animation: rotate-gradient 25s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes rotate-gradient {
  from { --gradient-angle: 0deg; }
  to { --gradient-angle: 360deg; }
}

.hero-badge {
  position: absolute;
  top: 6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-content {
  max-width: 900px;
  padding: 0 var(--container-padding);
}

.hero h1 {
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  padding-bottom: 0.1em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3.5vw, 2.5rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-description {
  max-width: 650px;
  margin: 0 auto 3rem;
}

.hero-description p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-secondary);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 1.25rem 2.5rem;
  background: var(--accent);
  color: #000000;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 20px;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 30px rgba(212, 168, 83, 0.3), 0 0 0 1px rgba(212, 168, 83, 0.5);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: shimmer-hero 3s infinite;
}

.hero-cta:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(212, 168, 83, 0.4), 0 0 0 2px rgba(212, 168, 83, 0.7);
}

@keyframes shimmer-hero {
  0% { left: -100%; }
  50% { left: -100%; }
  100% { left: 100%; }
}

.hero-proof {
  margin-top: 1.5rem;
}

.proof-text {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.2);
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  display: inline-block;
}

/* Difference Section (ChatGPT Comparison) */
.difference-section {
  padding: var(--section-gap) 0;
  background: var(--bg-surface);
  text-align: center;
}

.difference-section h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 4rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.split-story {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 3rem;
  margin: 5rem 0;
  align-items: stretch;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.story-side {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.story-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 2rem;
  position: relative;
}

.story-divider::before {
  content: '';
  position: absolute;
  top: -50%;
  bottom: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.vs-text {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), rgba(212, 168, 83, 0.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 1rem 1.5rem;
  background-color: rgba(212, 168, 83, 0.1);
  border: 2px solid rgba(212, 168, 83, 0.3);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  letter-spacing: -0.02em;
}

.story-visual {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.chat-window, .ai-house {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.5rem;
  width: 100%;
  max-width: 320px;
  position: relative;
}

.window-header, .house-header {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  text-align: center;
  font-weight: 500;
}

.chat-flow {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.bubble {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.875rem;
  line-height: 1.4;
}

.bubble:not(.ai) {
  background: rgba(212, 168, 83, 0.2);
  color: var(--text-primary);
  align-self: flex-end;
  max-width: 80%;
}

.bubble.ai {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  align-self: flex-start;
  max-width: 80%;
}

.reset-notice, .proactive-notice {
  text-align: center;
  font-size: 0.8125rem;
  padding: 0.5rem;
  border-radius: 8px;
  font-weight: 500;
}

.reset-notice {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
}

.proactive-notice {
  color: var(--accent);
  background: rgba(212, 168, 83, 0.1);
}

.house-interior {
  margin-bottom: 1rem;
}

.memory-shelf {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.memory-item {
  padding: 0.625rem 0.875rem;
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 8px;
  font-size: 0.8125rem;
  color: var(--accent);
  text-align: left;
}

.story-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.story-content ul {
  list-style: none;
  text-align: left;
}

.story-content li {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 1.5rem;
}

.story-content li::before {
  content: '●';
  color: var(--accent);
  position: absolute;
  left: 0;
  top: 0;
}

.integration-note {
  margin-top: 3rem;
  text-align: center;
}

.integration-note p {
  font-size: 1.125rem;
  color: var(--text-primary);
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 12px;
  padding: 1.25rem 2rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Demo Section */
.demo-section {
  padding: var(--section-gap) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.demo-intro {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
}

.demo-intro h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.demo-intro p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.chat-container {
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.chat-avatar {
  font-size: 1.5rem;
}

.chat-info {
  flex: 1;
}

.chat-name {
  font-weight: 600;
  font-size: 1.125rem;
}

.chat-status {
  color: var(--accent);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.chat-messages {
  padding: 1.5rem;
  max-height: 500px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
  flex-direction: column;
}

.message.user {
  align-items: flex-end;
}

.message.assistant {
  align-items: flex-start;
}

.message-content {
  max-width: 80%;
  padding: 0.875rem 1.125rem;
  border-radius: 18px;
  line-height: 1.5;
}

.message.user .message-content {
  background: var(--accent);
  color: #000000;
}

.message.assistant .message-content {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.message.typing .message-content {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem 1.125rem;
}

.date-separator {
  display: flex;
  align-items: center;
  margin: 2rem 0 1rem;
  gap: 1rem;
}

.date-line {
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.date-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  padding: 0 1rem;
  background: var(--bg-primary);
}

.typing-dots {
  display: flex;
  gap: 4px;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: typing-bounce 1.5s infinite;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing-bounce {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

.demo-caption {
  margin-top: 2rem;
  text-align: center;
  max-width: 500px;
}

.demo-caption p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Persona Demos */
.persona-demos {
  margin-top: 4rem;
  max-width: 800px;
  width: 100%;
}

.demo-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 3rem;
}

.demo-tab {
  padding: 1rem 2rem;
  background: transparent;
  border: none;
  border-radius: 16px;
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  white-space: nowrap;
}

.demo-tab:hover:not(.active) {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.demo-tab.active {
  background: var(--accent);
  color: #000000;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(212, 168, 83, 0.3);
}

.tab-content {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 2rem;
}

.mini-chat {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mini-message {
  padding: 0.875rem 1.125rem;
  border-radius: 16px;
  font-size: 0.9375rem;
  line-height: 1.5;
  max-width: 85%;
}

.mini-message.you {
  background: var(--accent);
  color: #000000;
  align-self: flex-end;
}

.mini-message.ai {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  align-self: flex-start;
}

/* Proof Section */
.proof-section {
  padding: var(--section-gap) 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #030303 20%, #050505 50%, #030303 80%, var(--bg-primary) 100%);
  border-top: 2px solid rgba(212, 168, 83, 0.2);
  border-bottom: 2px solid rgba(212, 168, 83, 0.2);
  position: relative;
  box-shadow: inset 0 0 100px rgba(0, 0, 0, 0.5);
}

.proof-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.proof-header {
  text-align: center;
  margin-bottom: 4rem;
}

.proof-header h2 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.proof-subtitle {
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.proof-content {
  max-width: 800px;
  margin: 0 auto;
}

.proof-intro {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 3rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 2rem;
}

/* Timeline */
.timeline {
  position: relative;
  margin: 3rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 2rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(212, 168, 83, 0.3), var(--accent));
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 1.25rem;
  top: 0.5rem;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  z-index: 2;
}

.timeline-item.final::before {
  background: linear-gradient(135deg, var(--accent), #fff);
  box-shadow: 0 0 20px rgba(212, 168, 83, 0.5);
}

.timeline-day {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.3);
  border-radius: 20px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

.timeline-content {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 1.5rem;
}

.timeline-content p {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.timeline-content p:last-child {
  margin-bottom: 0;
}

.timeline-highlight {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 12px;
  padding: 0.875rem 1.25rem;
  margin-top: 1rem;
  text-align: center;
}

.timeline-highlight.hero {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.15), rgba(212, 168, 83, 0.05));
  border: 2px solid var(--accent);
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.timeline-highlight.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 168, 83, 0.1), transparent);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Telegram Mockup */
.telegram-mockup {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.5rem;
  margin: 1rem 0;
}

.message-bubble {
  display: inline-block;
  padding: 0.75rem 1rem;
  border-radius: 18px;
  font-family: monospace;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  max-width: 70%;
}

.message-bubble.user {
  background: var(--accent);
  color: #000000;
  margin-left: auto;
  display: block;
  text-align: right;
}

.message-time {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: right;
  font-style: italic;
}

/* Proof Economics */
.proof-economics {
  margin: 3rem 0;
  text-align: center;
}

.economics-highlight {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.1), rgba(212, 168, 83, 0.05));
  border: 2px solid var(--accent);
  border-radius: 20px;
  padding: 2rem;
  display: inline-block;
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
}

.economics-highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 168, 83, 0.1), transparent);
  animation: shimmer 4s infinite;
  animation-delay: 1s;
}

/* Proof Footer */
.proof-footer {
  text-align: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.proof-reality {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.proof-meta {
  font-size: 1.125rem;
  color: var(--text-muted);
  font-style: italic;
}

.proof-meta em {
  color: var(--accent);
  font-weight: 500;
}

/* Conversation Excerpts */
.conversation-excerpt {
  margin-bottom: 4rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.conversation-excerpt:hover {
  transform: translateY(-2px);
}

.excerpt-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.5rem 1rem;
  display: inline-block;
  width: 100%;
  text-align: center;
}

.chat-exchange {
  background: #1a1a1a;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 2.5rem;
  position: relative;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
}

.chat-message {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

.chat-message:last-child {
  margin-bottom: 0;
}

.chat-message.human {
  align-items: flex-end;
}

.chat-message.ai {
  align-items: flex-start;
}

.chat-message .message-content {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  padding: 1.25rem 1.5rem;
  border-radius: 18px;
  max-width: 85%;
  position: relative;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.chat-message.human .message-content {
  background: linear-gradient(135deg, #d4a853, #c49543);
  border: none;
  color: #000000;
  font-weight: 500;
}

.chat-message.ai .message-content {
  background: linear-gradient(135deg, #2a2a2a, #1f1f1f);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.chat-message .message-sender {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-weight: 500;
  font-family: var(--font-sans);
}

.chat-message.human .message-sender {
  text-align: right;
}

.chat-message.ai .message-sender {
  text-align: left;
}

/* Scores Evolution */
.scores-evolution {
  text-align: center;
}

.scores-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.score-changes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 400px;
  margin: 0 auto;
}

.score-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  font-family: var(--font-sans);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.score-line:hover {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  border-color: rgba(212, 168, 83, 0.3);
  transform: translateX(4px);
}

.customer-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.125rem;
}

.score-change {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.score-before {
  font-weight: 700;
  color: #ff4757;
  font-size: 1.25rem;
  background: rgba(255, 71, 87, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 71, 87, 0.3);
}

.arrow {
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 800;
}

.score-after {
  font-weight: 700;
  color: #2ed573;
  font-size: 1.25rem;
  background: rgba(46, 213, 115, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 8px;
  border: 1px solid rgba(46, 213, 115, 0.3);
}

/* Conversation Closer */
.conversation-closer {
  margin-top: 4rem;
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  position: relative;
}

.conversation-closer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}

.conversation-closer p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.conversation-closer p:last-child {
  margin-bottom: 0;
}

.closer-cta {
  font-size: 1.25rem !important;
  color: var(--accent) !important;
  font-weight: 600 !important;
  margin-top: 1.5rem !important;
}

/* How It Works */
.how-it-works {
  padding: var(--section-gap) 0;
  background: var(--bg-surface);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 4rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.step {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.step:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(212, 168, 83, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.step-icon {
  font-size: 4rem;
  background: linear-gradient(135deg, var(--accent), rgba(212, 168, 83, 0.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 1rem;
  background-color: rgba(212, 168, 83, 0.1);
  border: 2px solid rgba(212, 168, 83, 0.3);
  border-radius: 20px;
  width: 6rem;
  height: 6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step p {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text-primary);
  max-width: 280px;
  line-height: 1.4;
}

.step-detail {
  font-size: 1.125rem !important;
  font-weight: 400 !important;
  color: var(--text-secondary) !important;
  margin-top: 0.5rem !important;
  line-height: 1.6 !important;
  max-width: 250px !important;
}

/* FAQ Section */
.faq-section {
  padding: var(--section-gap) 0;
  background: var(--bg-primary);
}

.faq-section h2 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
  text-align: center;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s var(--ease-out-quart);
}

.faq-item:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(212, 168, 83, 0.3);
}

.faq-item[open] {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--accent);
}

.faq-item summary {
  padding: 1.5rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s var(--ease-out-quart);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform 0.3s var(--ease-out-quart);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-content {
  padding: 0 2rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.faq-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-top: 1rem;
}

.faq-content em {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
}

/* Story Section */
.story {
  padding: var(--section-gap) 0;
  text-align: center;
}

.story-content {
  max-width: 700px;
  margin: 0 auto;
}

.story h2 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

.story-text {
  margin-bottom: 4rem;
}

.story-text p {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Simplified Pricing */
.pricing-simple {
  margin-bottom: 4rem;
}

.main-price {
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.15), rgba(212, 168, 83, 0.05));
  border: 3px solid var(--accent);
  border-radius: 24px;
  padding: 4rem 3rem;
  margin-bottom: 3rem;
  position: relative;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 0 40px rgba(212, 168, 83, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.main-price::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 168, 83, 0.1), transparent);
  animation: shimmer-price 4s infinite;
}

@keyframes shimmer-price {
  0% { left: -100%; }
  50% { left: -100%; }
  100% { left: 100%; }
}

.price-amount {
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.price-amount span {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-muted);
}

.price-tagline {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.price-description {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.other-options {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.other-options p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 1.5rem 2rem;
}

/* Guarantee */
.guarantee {
  margin-bottom: 4rem;
  text-align: center;
}

.guarantee-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), rgba(212, 168, 83, 0.8));
  color: #000000;
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 20px rgba(212, 168, 83, 0.3);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.guarantee-badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer-badge 3s infinite;
}

.guarantee p {
  font-size: 1.375rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.1), rgba(212, 168, 83, 0.05));
  border: 2px solid rgba(212, 168, 83, 0.4);
  border-radius: 20px;
  padding: 2.5rem 3rem;
  max-width: 650px;
  margin: 0 auto;
  position: relative;
  font-weight: 500;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

@keyframes shimmer-badge {
  0% { left: -100%; }
  50% { left: -100%; }
  100% { left: 100%; }
}

.final-cta {
  display: inline-flex;
  align-items: center;
  padding: 1.5rem 3rem;
  background: linear-gradient(135deg, var(--accent), rgba(212, 168, 83, 0.9));
  color: #000000;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.375rem;
  border-radius: 20px;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 10px 35px rgba(212, 168, 83, 0.3), 0 0 0 2px rgba(212, 168, 83, 0.5);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer-final 3s infinite;
}

.final-cta:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 15px 50px rgba(212, 168, 83, 0.4), 0 0 0 3px rgba(212, 168, 83, 0.7);
}

@keyframes shimmer-final {
  0% { left: -100%; }
  50% { left: -100%; }
  100% { left: 100%; }
}

.cta-details {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.cta-details a {
  color: var(--accent);
  text-decoration: none;
}

.cta-details a:hover {
  text-decoration: underline;
}

/* For Machines */
.for-machines {
  padding: 4rem 0 6rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0a0a0a 100%);
}

.for-machines p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  display: inline-block;
}

.for-machines a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.for-machines a:hover {
  color: rgba(212, 168, 83, 0.8);
  text-decoration: underline;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --section-gap: 6rem;
  }
  
  .nav {
    padding: 1rem 0;
  }
  
  .nav-cta {
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
  }
  
  .hero {
    min-height: 100svh;
    padding: 5rem 0 2rem;
  }
  
  .hero-badge {
    top: 4.5rem;
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
  }
  
  .hero-cta {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
  
  .split-story {
    grid-template-columns: 1fr;
    gap: 4rem;
    text-align: center;
  }
  
  .story-divider {
    order: 2;
    padding: 2rem 0;
  }

  .story-divider::before {
    top: -25%;
    bottom: -25%;
    width: 1px;
  }
  
  .vs-text {
    font-size: 2rem;
    padding: 1rem 1.25rem;
  }
  
  .chat-container {
    margin: 0 1rem;
  }
  
  .chat-header {
    padding: 1rem;
  }
  
  .chat-messages {
    padding: 1rem;
    max-height: 400px;
  }
  
  .demo-tabs {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  .demo-tab {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .tab-content {
    padding: 1.5rem;
  }
  
  /* Proof Section Mobile */
  .proof-intro {
    padding: 1.5rem;
    font-size: 1.125rem;
  }
  
  .timeline {
    margin: 2rem 0;
  }
  
  .timeline::before {
    left: 1rem;
  }
  
  .timeline-item {
    padding-left: 3rem;
    margin-bottom: 2rem;
  }
  
  .timeline-item::before {
    left: 0.75rem;
    width: 1rem;
    height: 1rem;
  }
  
  .timeline-content {
    padding: 1rem;
  }
  
  .timeline-content p {
    font-size: 1rem;
  }
  
  .timeline-highlight {
    font-size: 0.9375rem;
    padding: 0.75rem 1rem;
  }
  
  .timeline-highlight.hero {
    font-size: 1.125rem;
    padding: 1rem 1.25rem;
  }
  
  .telegram-mockup {
    padding: 1rem;
  }
  
  .economics-highlight {
    font-size: 1.5rem;
    padding: 1.5rem;
  }
  
  .proof-reality {
    font-size: 1.25rem;
  }
  
  .proof-meta {
    font-size: 1rem;
  }
  
  .steps {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 1rem 0;
  }

  .step {
    padding: 1.5rem 1rem;
    gap: 1rem;
  }

  .step-icon {
    font-size: 3rem;
    width: 5rem;
    height: 5rem;
  }

  .step p {
    font-size: 1.25rem;
  }

  .step-detail {
    font-size: 1rem !important;
  }
  
  .faq-item summary {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  .faq-content {
    padding: 0 1.5rem 1rem;
  }
  
  .main-price {
    padding: 2rem 1.5rem;
    margin-bottom: 1.5rem;
  }
  
  .price-amount {
    font-size: 3rem;
  }
  
  .price-tagline {
    font-size: 1.25rem;
  }
  
  .other-options p {
    padding: 1.25rem 1.5rem;
    font-size: 0.9375rem;
  }
  
  .guarantee p {
    padding: 1.5rem 1.75rem;
    font-size: 1.125rem;
  }
  
  .final-cta {
    padding: 1rem 2rem;
    font-size: 1.125rem;
  }
  
  .integration-note p {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  /* Conversation Excerpts Mobile */
  .conversation-excerpt {
    margin-bottom: 3rem;
  }
  
  .excerpt-label {
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
  }
  
  .chat-exchange {
    padding: 1.5rem;
  }
  
  .chat-message .message-content {
    font-size: 0.875rem;
    padding: 0.875rem 1rem;
    max-width: 90%;
  }
  
  .chat-message .message-sender {
    font-size: 0.75rem;
  }
  
  .scores-intro {
    font-size: 0.9375rem;
    margin-bottom: 1.5rem;
  }
  
  .score-line {
    padding: 0.875rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .score-change {
    gap: 0.5rem;
  }
  
  .score-before, .score-after {
    font-size: 1rem;
  }
  
  .conversation-closer {
    margin-top: 3rem;
    padding: 2rem 1.5rem;
  }
  
  .conversation-closer p {
    font-size: 1rem;
    margin-bottom: 1rem;
  }
  
  .closer-cta {
    font-size: 1.125rem !important;
    margin-top: 1.25rem !important;
  }
}

/* Ultra-wide screens */
@media (min-width: 1400px) {
  .hero h1 {
    font-size: 10rem;
  }
  
  .hero-subtitle {
    font-size: 3rem;
  }
  
  .hero-description p {
    font-size: 1.375rem;
  }
}

/* Smooth scrolling on all devices */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --bg-primary: #000000;
    --bg-surface: #111111;
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent: #ffdd44;
  }
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

/* Selection styles */
::selection {
  background: var(--accent);
  color: #000000;
}

/* Use case actions */
.use-case-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.use-case-actions a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.5rem;
  border-radius: 6px;
  transition: all 0.2s ease;
  background: rgba(212, 168, 83, 0.05);
  border: 1px solid rgba(212, 168, 83, 0.15);
}

.use-case-actions a:hover {
  background: rgba(212, 168, 83, 0.1);
  border-color: rgba(212, 168, 83, 0.3);
  transform: translateX(4px);
}